With a combined age of 42 ... Jamie Lynn Spears and her baby daddy Casey Aldridge took their 2-year-old daughter Maddie to Universal Studios in L.A. Saturday ... just days after the couple announced their reconciliation.
As we previously reported, 19-year-old Jamie Lynn and 21-year-old Casey had broken off their engagement last year ... after moving back to Mississippi.
But now, it appears the couple is working things out -- and they're even traveling together.
Yo, Levi and Bristol -- you guys paying attention?!